Refactor: Split portfolio to projects and writings sections, and update content structure

- Renamed 'portfolio' collection to 'projects' in content configuration.
- Introduced a new 'writings' collection with corresponding schema.
- Updated README to reflect changes in content structure and navigation.
- Removed the old portfolio page and added new pages for projects and writings.
- Added multiple new project and writing markdown files with relevant content.
- Updated license year to 2025.
- Enhanced AppHeader for new navigation links.
- Improved ProseImg component styling.

content/projects/python-data-ml.md

@@ -0,0 +1,29 @@
+---
+slug: python-data-ml
+title: 🐍 Python Data & ML
+description: A repository dedicated to learning and practicing Python libraries for machine learning.
+publishedAt: 2024/11/01
+readingTime: 1
+tags:
+  - data
+  - ai
+  - python
+---
+
+[Python Data & ML](https://github.com/ArthurDanjou/Python-Data-Machine-Learning) is a repository dedicated to learning and practicing Python libraries for machine learning. It includes a variety of projects and exercises that cover the following topics.
+This project explores tools like NumPy, Pandas, scikit-learn, and others to understand and master key machine learning concepts. Perfect for strengthening skills in data processing, modeling, and algorithm optimization.
+
+The goal is to improve my level of understanding of machine learning and data science concepts, as well as to practice Python programming and using libraries like NumPy, Pandas, scikit-learn, etc., to manipulate and analyze data, during my free time.
+
+## Tech Stack
+
+- [Python](https://www.python.org/)
+- [NumPy](https://numpy.org/)
+- [Pandas](https://pandas.pydata.org/)
+- [scikit-learn](https://scikit-learn.org/stable/)
+- [Matplotlib](https://matplotlib.org/)
+- [Seaborn](https://seaborn.pydata.org/)
+- [Jupyter Notebook](https://jupyter.org/)
+- [TensorFlow](https://www.tensorflow.org/)
+- [Keras](https://keras.io/)
+- [PyTorch](https://pytorch.org/)